Answer:
The fundamental social classes were: the feudal lord, the serf and the clergy. The feudal lord ruled the fief, dispensed justice, and collected taxes. Although thw monarchy was the form of goverment, the feudal lord had the power at a local power. Culture was controlled by the Church.
Trade barriers come in many forms. Quota is one. This is when a country sets a limit to the imported products. This is done for a number of reasons. One is because the government of the importing country wants to protect its domestic manufacturers. Other barriers or limitations are added costs such as tariffs, duties, and taxes.
The sinking of the Lustania? I think that was the name of the cruise ship, and was a rallying cry for the US into ww1, as Americans died in the transit.
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